irrte sich

was mistaken

→ irren
phrase Rare #35,078
was mistaken The simple past form of sich irren, used for someone being wrong or mistaken about something. It is the third-person singular form; the first- and second-person forms are “irrte mich” and “irrtest dich.”
GE: Der Arzt irrte sich in seiner Diagnose.
EN: The doctor was mistaken in his diagnosis.

Er irrte sich nicht.

He was not mistaken.

— Bullet Train (2022)

Die Ärztin irrte sich in ihrer Diagnose.

The doctor was wrong in her diagnosis.

Der Arzt irrte sich in seiner Diagnose.

The doctor was wrong in his diagnosis.

Sie irrte sich in ihrer Annahme, er sei gekommen, um sie zu sehen.

She was mistaken in her assumption that he had come to see her.

Leider irrte sich Bart.

Unfortunately, Bart was mistaken.

— Carandiru (2003)

Tom irrte sich, Maria aber hatte recht.

Tom was mistaken, but Maria was right.